Boiler-flue scraper



(Model.)

J. L. KELLEY. Boiler Pl-ue Scraper.

No. 243,574. Patented June 28, 188i.

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UNITED STATES PATENT OFFICE.

JOHN L. KELLEY, OF ERIE, PENNSYLVANIA.

BOlLER-FLUE SCRAPER.

SPECIFICATION forming part of Letters Patent No. 243,574, dated June 28,1881.

Application filed April 23, 1881.

To all whom it may concern:

Be it known that 1, JOHN L. KELLEY, of Erie, in the county of Erie andState of Pennsylvania, have invented a new and Improved Boiler-FlueScraper, of which the followingis afull, clear, and exact description.

The object of this invention is to construct a simple, durable, and moreeffective device for scraping and removing soot, &c.,' from boilerflues.

Figure 1 is a longitudinal elevation of the scraper with parts brokenaway to exhibit other parts. Fig. 2 is a longitudinal sectionalelevation of the same on line y y, Fig. 3, with parts broken away toexhibit other parts. Fig.

3 is a cross-section of the same on line as m, Fig. 1.

Similar letters of reference indicate corresponding parts.

In the drawings, A represents a handle, to which are pivoted at oppositepoints the arms B B, that are curved outward at about midway of theirlengths, and are connected at their opposite ends, in pairs, by the bentcrossed springs O 0, having wedges H riveted or otherwise fixed on theirends, that serve also to force said arms B B apart, and thereby adjust-the scraper to flues of any diameter. A spindle, D, projecting from thehandle A in the line of its axis, extends centrally between the arms B Bto about midway of their length, and has secured upon its end at rightangles thereto a disk, E, provided with peripheral mortises a, in whichthe arms B B are entered, and thereby firmly held against torsionalstrain when the scraper is rotated in a flue. These arm's B B are, ontheir outer convex faces, provided with flanges or ribs 1) 0, theflanges b extending from near the pivoted ends of said arms B, and onone edge of the said arms B to the upper face of the disk E, while theflanges or ribs 0 extend downward on the opposite edges of said arms B,from near their points to within a short distance of the disk 5 E, andserve-as guides, on entering the fiues,

for the arms B and scraping-plates F. These ribs 1) c conform with thecurve of the arms B,

deepening as they approach the disk E.

F F represent the segmental scraping-plates 50 that are formed upon thearms B B at right angles thereto, between the opposite ends of (Model.)

the ribs 12 c, that serve to give them additional strength and rigidity.The convex outer edges of these plates F together form a circle that isdesigned to fit the boiler-flues. outer edges of these plates F are castin corresponding sockets steel wearing-plates G, that are designed totake the wear of the scraper as it is used.

It is intended that the arms B and plates F shall be of cast ormalleable iron, and that arm and plate shall. be in one piece, and thatthe wearingplates G shall be of steel, so that the durability of thescraper may be increased. The inner and concave faces of the arms B aremortised or channeled near their extremities, as shown at s, and inthese mortises s are held wedges H, that are rigidly fixed on the endsof the springs O by set screws 1, which are entered through the slots tof the said wedges H into the arms B. The said mortises s prevent thelateral movement of the wedges H.

When it is desired to set out the plates F Gr the set-screws I areloosened, and the springs G, with their wedges H, are drawn outward inthe direction of the arrow, Fig. 1, whereby the wedges H, moving on theinclined surface of the mortises s on the inner faces of the arms B,force said arms B B apart, to compensate for the wear on the said platesG, or to set them out for a larger flue. When the arms B are suitablyadjusted the set screws I are turned again to hold the springs andwedges G H in place. The scraper, beingintroduced into a boiler-flue, ismoved back and forth with a rotary motion, whereby the soot, &c., isscraped off by the arms B and plates F Gr, while the disk E serves, incombination with the plates F, to push or pull the loosened soot, 850.,from the said flue.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In aboiler-flue cleaner, the arms B, hinged at the rear end to handleA, and connected at the front end by a spring, 0, as and for the purposedescribed.

' 2. In a boiler-flue cleaner, the combination, with the arms B, havingribs b c, of the scraping-plates F, formed on said arms and between saidribs, as and for the purpose set forth.

In the 55 3. The combination, with the arms B, carrying scrapers, of thedisk E, arranged on the end of a central spindle, 1), between said arms,and having peripheral inortises (0, whereby 5 said disk preventstorsional strain upon the arms, and also serves to push or pull theloosened soot from the flue, as described.

4. In a boiler-flue scraper, the combination,

with the segmental scraping-plates F, of the wearin g-platesG,substantially as herein shown 10 and described, whereby the durabilityof the scraper is increased, as set forth.

JOHN L. KELLEY. Witnesses:

F. G. SCHLAUDEEKE, .Tr., G. A. LOESOH.

